GitHub user packet23 opened a pull request:
https://github.com/apache/flink/pull/5145
[FLINK-8230] [ORC] Improved mapping of Orc records to Flink Table rows.
## What is the purpose of the change
Improved mapping of Orc records to Flink table rows and ensured nested
structs are correctly mapped.
## Brief change log
- Introduced OrcRowReader to be used on a single input split
- OrcRowReader was adapted from
org.apache.orc.mapred.OrcMapredRecordReader
- Added a bunch of test datasets, mostly from orc distribution
## Verifying this change
This change added tests and can be verified as follows:
- OrcRowReaderTest maps test datasets to rows comparing count
- OrcRowReader is also covered by existing flink-orc unit tests.
- Manually verified the change by running a 4 node cluster on YARN,
reading an existing full dataset
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: no
- The serializers: don't know
- The runtime per-record code paths (performance sensitive): yes
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: don't know
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/packet23/flink FLINK-8230
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5145.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #5145
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commit 93ef978bb5a55700fa25551eda5464860d6d1ae2
Author: Sebastian Klemke <[email protected]>
Date: 2017-12-09T19:35:01Z
[FLINK-8230] [ORC] Improved mapping of Orc records to Flink Table rows.
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